[PATCH v5 5/6] ntdll: Clarify NtAllocateVirtualMemory zero_bits parameter semantics
Rémi Bernon
rbernon at codeweavers.com
Wed May 29 07:04:43 CDT 2019
This parameter was misinterpreted as an alignment parameter for the
lower bits of the allocated memory region, although it is a constraint
on the higher bits.
Add a new internal ntdll virtual_alloc_aligned function that has a
separate alignment parameter which is now used instead of the zero_bits
parameter.
Signed-off-by: Rémi Bernon <rbernon at codeweavers.com>
---
dlls/ntdll/directory.c | 4 ++--
dlls/ntdll/heap.c | 5 ++---
dlls/ntdll/ntdll_misc.h | 2 ++
dlls/ntdll/signal_arm.c | 12 ++++++------
dlls/ntdll/signal_arm64.c | 16 ++++++++--------
dlls/ntdll/signal_i386.c | 16 ++++++++--------
dlls/ntdll/signal_powerpc.c | 12 ++++++------
dlls/ntdll/signal_x86_64.c | 16 ++++++++--------
dlls/ntdll/tests/virtual.c | 3 ++-
dlls/ntdll/thread.c | 3 +--
dlls/ntdll/virtual.c | 33 ++++++++++++++++++++++++++-------
11 files changed, 71 insertions(+), 51 deletions(-)
diff --git a/dlls/ntdll/directory.c b/dlls/ntdll/directory.c
index bbdbbe9781f..6605999b824 100644
--- a/dlls/ntdll/directory.c
+++ b/dlls/ntdll/directory.c
@@ -1603,14 +1603,14 @@ static KERNEL_DIRENT *start_vfat_ioctl( int fd )
SIZE_T size = 2 * sizeof(*de) + page_size;
void *addr = NULL;
- if (NtAllocateVirtualMemory( GetCurrentProcess(), &addr, 1, &size, MEM_RESERVE, PAGE_READWRITE ))
+ if (virtual_alloc_aligned( &addr, 0, &size, MEM_RESERVE, PAGE_READWRITE, 1 ))
return NULL;
/* commit only the size needed for the dir entries */
/* this leaves an extra unaccessible page, which should make the kernel */
/* fail with -EFAULT before it stomps all over our memory */
de = addr;
size = 2 * sizeof(*de);
- NtAllocateVirtualMemory( GetCurrentProcess(), &addr, 1, &size, MEM_COMMIT, PAGE_READWRITE );
+ virtual_alloc_aligned( &addr, 0, &size, MEM_COMMIT, PAGE_READWRITE, 1 );
}
/* set d_reclen to 65535 to work around an AFS kernel bug */
diff --git a/dlls/ntdll/heap.c b/dlls/ntdll/heap.c
index cccaaee1d45..2d2caf551e3 100644
--- a/dlls/ntdll/heap.c
+++ b/dlls/ntdll/heap.c
@@ -726,8 +726,7 @@ static void *allocate_large_block( HEAP *heap, DWORD flags, SIZE_T size )
LPVOID address = NULL;
if (block_size < size) return NULL; /* overflow */
- if (NtAllocateVirtualMemory( NtCurrentProcess(), &address, 5,
- &block_size, MEM_COMMIT, get_protection_type( flags ) ))
+ if (virtual_alloc_aligned( &address, 0, &block_size, MEM_COMMIT, get_protection_type( flags ), 5 ))
{
WARN("Could not allocate block for %08lx bytes\n", size );
return NULL;
@@ -1521,7 +1520,7 @@ void heap_set_debug_flags( HANDLE handle )
void *ptr = NULL;
SIZE_T size = MAX_FREE_PENDING * sizeof(*heap->pending_free);
- if (!NtAllocateVirtualMemory( NtCurrentProcess(), &ptr, 4, &size, MEM_COMMIT, PAGE_READWRITE ))
+ if (!virtual_alloc_aligned( &ptr, 0, &size, MEM_COMMIT, PAGE_READWRITE, 4 ))
{
heap->pending_free = ptr;
heap->pending_pos = 0;
diff --git a/dlls/ntdll/ntdll_misc.h b/dlls/ntdll/ntdll_misc.h
index 2d83f541bd5..ae0e6b5742c 100644
--- a/dlls/ntdll/ntdll_misc.h
+++ b/dlls/ntdll/ntdll_misc.h
@@ -168,6 +168,8 @@ extern NTSTATUS nt_to_unix_file_name_attr( const OBJECT_ATTRIBUTES *attr, ANSI_S
UINT disposition ) DECLSPEC_HIDDEN;
/* virtual memory */
+extern NTSTATUS virtual_alloc_aligned( PVOID *ret, ULONG zero_bits, SIZE_T *size_ptr,
+ ULONG type, ULONG protect, ULONG alignment );
extern NTSTATUS virtual_map_section( HANDLE handle, PVOID *addr_ptr, ULONG zero_bits, SIZE_T commit_size,
const LARGE_INTEGER *offset_ptr, SIZE_T *size_ptr, ULONG protect,
pe_image_info_t *image_info ) DECLSPEC_HIDDEN;
diff --git a/dlls/ntdll/signal_arm.c b/dlls/ntdll/signal_arm.c
index e01c8ce2193..cf7f2d13160 100644
--- a/dlls/ntdll/signal_arm.c
+++ b/dlls/ntdll/signal_arm.c
@@ -967,22 +967,22 @@ int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
*/
NTSTATUS signal_alloc_thread( TEB **teb )
{
- static size_t sigstack_zero_bits;
+ static size_t sigstack_alignment;
SIZE_T size;
NTSTATUS status;
- if (!sigstack_zero_bits)
+ if (!sigstack_alignment)
{
size_t min_size = page_size;
/* find the first power of two not smaller than min_size */
- while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++;
+ while ((1u << sigstack_alignment) < min_size) sigstack_alignment++;
assert( sizeof(TEB) <= min_size );
}
- size = 1 << sigstack_zero_bits;
+ size = 1 << sigstack_alignment;
*teb = NULL;
- if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), (void **)teb, sigstack_zero_bits,
- &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE )))
+ if (!(status = virtual_alloc_aligned( (void **)teb, 0, &size, MEM_COMMIT | MEM_TOP_DOWN,
+ PAGE_READWRITE, sigstack_alignment )))
{
(*teb)->Tib.Self = &(*teb)->Tib;
(*teb)->Tib.ExceptionList = (void *)~0UL;
diff --git a/dlls/ntdll/signal_arm64.c b/dlls/ntdll/signal_arm64.c
index 94520c95ced..d2d43b34bc1 100644
--- a/dlls/ntdll/signal_arm64.c
+++ b/dlls/ntdll/signal_arm64.c
@@ -871,24 +871,24 @@ int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
*/
NTSTATUS signal_alloc_thread( TEB **teb )
{
- static size_t sigstack_zero_bits;
+ static size_t sigstack_alignment;
SIZE_T size;
NTSTATUS status;
- if (!sigstack_zero_bits)
+ if (!sigstack_alignment)
{
size_t min_size = teb_size + max( MINSIGSTKSZ, 8192 );
/* find the first power of two not smaller than min_size */
- sigstack_zero_bits = 12;
- while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++;
- signal_stack_size = (1 << sigstack_zero_bits) - teb_size;
+ sigstack_alignment = 12;
+ while ((1u << sigstack_alignment) < min_size) sigstack_alignment++;
+ signal_stack_size = (1 << sigstack_alignment) - teb_size;
assert( sizeof(TEB) <= teb_size );
}
- size = 1 << sigstack_zero_bits;
+ size = 1 << sigstack_alignment;
*teb = NULL;
- if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), (void **)teb, sigstack_zero_bits,
- &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE )))
+ if (!(status = virtual_alloc_aligned( (void **)teb, 0, &size, MEM_COMMIT | MEM_TOP_DOWN,
+ PAGE_READWRITE, sigstack_alignment )))
{
(*teb)->Tib.Self = &(*teb)->Tib;
(*teb)->Tib.ExceptionList = (void *)~0UL;
diff --git a/dlls/ntdll/signal_i386.c b/dlls/ntdll/signal_i386.c
index b4e88d125f1..b2925062bf7 100644
--- a/dlls/ntdll/signal_i386.c
+++ b/dlls/ntdll/signal_i386.c
@@ -2312,25 +2312,25 @@ static void ldt_unlock(void)
*/
NTSTATUS signal_alloc_thread( TEB **teb )
{
- static size_t sigstack_zero_bits;
+ static size_t sigstack_alignment;
struct x86_thread_data *thread_data;
SIZE_T size;
void *addr = NULL;
NTSTATUS status;
- if (!sigstack_zero_bits)
+ if (!sigstack_alignment)
{
size_t min_size = teb_size + max( MINSIGSTKSZ, 8192 );
/* find the first power of two not smaller than min_size */
- sigstack_zero_bits = 12;
- while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++;
- signal_stack_mask = (1 << sigstack_zero_bits) - 1;
- signal_stack_size = (1 << sigstack_zero_bits) - teb_size;
+ sigstack_alignment = 12;
+ while ((1u << sigstack_alignment) < min_size) sigstack_alignment++;
+ signal_stack_mask = (1 << sigstack_alignment) - 1;
+ signal_stack_size = (1 << sigstack_alignment) - teb_size;
}
size = signal_stack_mask + 1;
- if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), &addr, sigstack_zero_bits,
- &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE )))
+ if (!(status = virtual_alloc_aligned( &addr, 0, &size, MEM_COMMIT | MEM_TOP_DOWN,
+ PAGE_READWRITE, sigstack_alignment )))
{
*teb = addr;
(*teb)->Tib.Self = &(*teb)->Tib;
diff --git a/dlls/ntdll/signal_powerpc.c b/dlls/ntdll/signal_powerpc.c
index 86398d8f54f..f23265445df 100644
--- a/dlls/ntdll/signal_powerpc.c
+++ b/dlls/ntdll/signal_powerpc.c
@@ -1018,22 +1018,22 @@ int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
*/
NTSTATUS signal_alloc_thread( TEB **teb )
{
- static size_t sigstack_zero_bits;
+ static size_t sigstack_alignment;
SIZE_T size;
NTSTATUS status;
- if (!sigstack_zero_bits)
+ if (!sigstack_alignment)
{
size_t min_size = page_size; /* this is just for the TEB, we don't use a signal stack yet */
/* find the first power of two not smaller than min_size */
- while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++;
+ while ((1u << sigstack_alignment) < min_size) sigstack_alignment++;
assert( sizeof(TEB) <= min_size );
}
- size = 1 << sigstack_zero_bits;
+ size = 1 << sigstack_alignment;
*teb = NULL;
- if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), (void **)teb, sigstack_zero_bits,
- &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE )))
+ if (!(status = virtual_alloc_aligned( (void **)teb, 0, &size, MEM_COMMIT | MEM_TOP_DOWN,
+ PAGE_READWRITE, sigstack_alignment )))
{
(*teb)->Tib.Self = &(*teb)->Tib;
(*teb)->Tib.ExceptionList = (void *)~0UL;
diff --git a/dlls/ntdll/signal_x86_64.c b/dlls/ntdll/signal_x86_64.c
index c2151f78c63..e56534068ff 100644
--- a/dlls/ntdll/signal_x86_64.c
+++ b/dlls/ntdll/signal_x86_64.c
@@ -3263,24 +3263,24 @@ int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
*/
NTSTATUS signal_alloc_thread( TEB **teb )
{
- static size_t sigstack_zero_bits;
+ static size_t sigstack_alignment;
SIZE_T size;
NTSTATUS status;
- if (!sigstack_zero_bits)
+ if (!sigstack_alignment)
{
size_t min_size = teb_size + max( MINSIGSTKSZ, 8192 );
/* find the first power of two not smaller than min_size */
- sigstack_zero_bits = 12;
- while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++;
- signal_stack_size = (1 << sigstack_zero_bits) - teb_size;
+ sigstack_alignment = 12;
+ while ((1u << sigstack_alignment) < min_size) sigstack_alignment++;
+ signal_stack_size = (1 << sigstack_alignment) - teb_size;
assert( sizeof(TEB) <= teb_size );
}
- size = 1 << sigstack_zero_bits;
+ size = 1 << sigstack_alignment;
*teb = NULL;
- if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), (void **)teb, sigstack_zero_bits,
- &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE )))
+ if (!(status = virtual_alloc_aligned( (void **)teb, 0, &size, MEM_COMMIT | MEM_TOP_DOWN,
+ PAGE_READWRITE, sigstack_alignment )))
{
(*teb)->Tib.Self = &(*teb)->Tib;
(*teb)->Tib.ExceptionList = (void *)~0UL;
diff --git a/dlls/ntdll/tests/virtual.c b/dlls/ntdll/tests/virtual.c
index d536b4a81af..59fa77b30e6 100644
--- a/dlls/ntdll/tests/virtual.c
+++ b/dlls/ntdll/tests/virtual.c
@@ -57,6 +57,7 @@ static void test_AllocateVirtualMemory(void)
zero_bits = 1;
status = pNtAllocateVirtualMemory(GetCurrentProcess(), &addr2, 1, &size,
MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
+ todo_wine
ok((status == STATUS_SUCCESS || broken(status == STATUS_INVALID_PARAMETER_3) /* winxp */) &&
((UINT_PTR)addr2 >> (32 - zero_bits)) == 0,
"NtAllocateVirtualMemory returned %08x, addr2: %p\n", status, addr2);
@@ -73,7 +74,7 @@ static void test_AllocateVirtualMemory(void)
addr2 = NULL;
status = pNtAllocateVirtualMemory(GetCurrentProcess(), &addr2, zero_bits, &size,
MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
- todo_wine_if(zero_bits >= 12)
+ todo_wine
ok((status == STATUS_SUCCESS || status == STATUS_NO_MEMORY) && ((UINT_PTR)addr2 >> (32 - zero_bits)) == 0,
"NtAllocateVirtualMemory with %d zero_bits returned %08x, addr2: %p\n", zero_bits, status, addr2);
if (status == STATUS_SUCCESS)
diff --git a/dlls/ntdll/thread.c b/dlls/ntdll/thread.c
index 46de839400d..96aa6be7f2c 100644
--- a/dlls/ntdll/thread.c
+++ b/dlls/ntdll/thread.c
@@ -184,8 +184,7 @@ void thread_init(void)
addr = NULL;
size = sizeof(*peb);
- NtAllocateVirtualMemory( NtCurrentProcess(), &addr, 1, &size,
- MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE );
+ virtual_alloc_aligned( &addr, 0, &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE, 1 );
peb = addr;
peb->FastPebLock = &peb_lock;
diff --git a/dlls/ntdll/virtual.c b/dlls/ntdll/virtual.c
index 78973a8cda4..a3ed96ff77f 100644
--- a/dlls/ntdll/virtual.c
+++ b/dlls/ntdll/virtual.c
@@ -2461,19 +2461,17 @@ void virtual_set_large_address_space(void)
NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_bits,
SIZE_T *size_ptr, ULONG type, ULONG protect )
{
- void *base;
- unsigned int vprot;
SIZE_T size = *size_ptr;
- SIZE_T mask = get_mask( zero_bits );
NTSTATUS status = STATUS_SUCCESS;
- BOOL is_dos_memory = FALSE;
- struct file_view *view;
- sigset_t sigset;
TRACE("%p %p %08lx %x %08x\n", process, *ret, size, type, protect );
if (!size) return STATUS_INVALID_PARAMETER;
- if (!mask) return STATUS_INVALID_PARAMETER_3;
+ if (zero_bits)
+ {
+ FIXME("Unimplemented zero_bits handling\n");
+ return STATUS_INVALID_PARAMETER_3;
+ }
if (process != NtCurrentProcess())
{
@@ -2499,6 +2497,27 @@ NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_
return result.virtual_alloc.status;
}
+ return virtual_alloc_aligned( ret, zero_bits, size_ptr, type, protect, 0 );
+}
+
+
+/***********************************************************************
+ * virtual_alloc_aligned (NTDLL.@)
+ *
+ * Same as NtAllocateVirtualMemory but with an alignment parameter
+ */
+NTSTATUS virtual_alloc_aligned( PVOID *ret, ULONG zero_bits, SIZE_T *size_ptr,
+ ULONG type, ULONG protect, ULONG alignment )
+{
+ void *base;
+ unsigned int vprot;
+ SIZE_T size = *size_ptr;
+ SIZE_T mask = get_mask( alignment );
+ NTSTATUS status = STATUS_SUCCESS;
+ BOOL is_dos_memory = FALSE;
+ struct file_view *view;
+ sigset_t sigset;
+
/* Round parameters to a page boundary */
if (is_beyond_limit( 0, size, working_set_limit )) return STATUS_WORKING_SET_LIMIT_RANGE;
--
2.20.1
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